Internet Header Length – Indicates the number of 4-byte blocks in the IPv4 header. The size of this field is 4 bits. Because an IPv4 header is a minimum of 20 bytes in size, the smallest value of the Internet Header Length (IHL) field is 5. IPv4 options can extend the minimum IPv4 header size in increments of 4 bytes.

This field is also called the Internet Header Length (IHL). Type of Service: this is used for QoS (Quality of Service). There are 8 bits that we can use to mark the packet which we can use to give the packet a certain treatment. You can read more about this field in …

May 28, 2016 · With IPv4, the header length is variable. The IHL is really a pointer to the start of the packet payload. Without this, you would be unable to know where the payload starts. IPv6 has a fixed header size, so the IHL is unnecessary, and it doesn't exist.

Mar 25, 2019 · IHL(Internet Header Length) field is 4 bit long and specifies the header length in 32 bit words. What does it mean?

Nov 16, 2014 · The Internet Header Length (IHL) field is the number of 32-bit words(=4 bytes) in the IPv4 header, including any options. Because this is also a 4-bit field, the IPv4 header is limited to a maximum of fifteen 32-bit words(=60 bytes)

Jan 15, 2025 · Learn what an IPv4 header is, how many fields an IPv4 header contains, what the meaning of each field is, and what the value is stored in each field. An IP header is bits of information attached to each data packet that is transported in the computer network.

The IP header starts with version (4 bits) and IHL (4 bits). The following IP packet shows the hex "c2 c2 0c 0c" at the beginning of the packet. That means "C" represents IPv4.

IHL (Internet Header Length): Specifies the length of the IP header in 32-bit words. The IHL field contains the size of the IPv4 header; it has 4 bits that specify the number of 32-bit words in the header.

Internet Header Length (IHL) This field (4 bit) indicates the length of the IP header and the unit is 4 bytes (32 bits). So, if the value of this field is 5, it means the length of IP header is 20 bytes (= 5 x 4 bytes).

Header Length—Technically, this is the Internet header length (IHL). It is the length of the IP header in 4-byte (32-bit) units known as “words,” and includes any option fields present and padding needed to align the header on a 32-bit boundary. In …